Leak-alarm for pneumatic tires.



E. J. 111311111111. LEAK ALARM POR PNBUMATIG TIRES.

APPLICATION FILED JAN. 29, 1910.

983,837. Patented 1181111911.

Fig. v1.

` an inner rod extension 02, of the valve and .mobiles or motorcycles, serving to give no- Voutward rod extension a', of the valve a,

EMIL J'. F. QUIRIN, 0F TIOGA CENTER, NEW YORK.

LEAK-ALARM FOR PNEUMATIC TIRES.

Specification of Letters Patent.

Patented Feb. '7, 1911.

Application filed January 29, 1910. Serial No. 540,888.

To all whom it may concern:

lle it known that I, EMIL J. F. QUIRIN, a citizen of the United States, resident 'of Tioga Center, in the county of Tioga and State of New York, have made a certain new and useful Invention in Leak-Alarms for Pneumatic Tires; and I declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon. which form a part of this specification. Figure i is a longitudinal central section of my invention as applied with,the valve elo-sed. Fig. 2 is a similar view with parts broken away and showing the valve open to sound the whistle. Fig. is a similar view with escape of air stopped.

The invention relates to an alarm device for application to pneumatic tires of autotice when a serious leakage occurs in order that the car may be stopped before it is caused to be deflected in its course by a deflated tire, which may result in serious loss of life or limb and damage to the car.

The invention consists in the novel construction and combinations of parts as hereinafter set forth.

In the accompanying drawings, illustrating the invention, the letter a, designates a spring controlled plunger valvein a nipple 7), having communication with the air chamber of the tire c, said valvebeing normally held closed by the pressure of air in the tire, and the tension of its spring a2, surrounding located between thevalve and a cup piece c3, having engagement with an inner shoulder c4, of said nipple, said cup piece being provided with lateral perforations c5. The inner rod extension c2, of the valve has slidable engagement with a central perforation c, of said cup piece.

el, is an attachment tube having detachable screw-threaded engagement d', with the nipple b, and containing a spring-pressed plunger c, having a bearing at c', against an an adjustment screw f, having screw-threaded engagement with the head f", of the tube d, havino` a bearing through its head f',

against t ie spring g, of the plunger e, wherei by upon adjustment of said screw f, the l coiled spring. f, will have its tension adjusted and be caused to press with greater or less `force against the plunger c, and valve a. Thus when the tire is pumped up to the point Where it is desired the alarm shall sound, say forty pounds pressure to the square inch, and the screw f, is adjusted until' the valve a, is pressed backward against the, tension of its spring a2, t'o open position as shown in Fig. 2 of the drawings, air will be admitted through the lateral perforations of the cup-piece past the valve into the cylinder or tube d, around the plunger, and will find an exit through a lateral opening'aZB, communicating with a right-angle whistle extension 71 of said tube to sound the whistle. The tube or cylinder d, with the plunger e, and whistle extension carried thereby, are now unscrewed from the nipple, I), and the tire uniped up to normal pressure, say 80 poun s to the square inch, when the tube el, and parts carried thereby are screwed in placev again upon the neck 7), the pressure of the spring g, as previously adjusted in the manner stated, being now insufficient to overcome the increased air pressure against the valie a, which will remain closed until a leak occurs in the tire and the pressure therein is reduced to forty pounds, when the alarm will sound as before stated.

y', indicates a jam nut for the adjusting screw, whereby when the regulation of the tension of the spring is made this regulation may be fixed against casual disarrangement. As shown in Fig. il of the drawings, after t-he whistle has sounded for a. suicient length of time to alarm the chauffeur of the motor ear, the plunger e will takea bearing against the screw-threaded end of the nipple 7), to stop further unnecessary escape of air from the tire in sounding the whistle.

Ilaving thus described Vmy invention, what I claim as new and desire to secure by Letto automaticallyopen the same when pressure in the tire is reduced beyond ay prede-4 termined point, said tubev having an air es-n... cape openlng and an alarm devlce 1n com-';

-sion spring for said valve, of a tube having detachable connection with said nipple2 a plunger Working in said tube, and a tenslon spring for said plunger pressing the plunger against said rod extensionandA capableof overcoming the tension of the spring of said valve to open the same when pressure in the tire is `reduced beyond a predetermined point, said tube having an air escape opening and an alarm devlce in communication with said opening. v j

3. The combination' with an inflation valve of a pneumatic tire consisting of a perforated nipple havin an inner shoulder and anouter perforate valve seat, a cup having engagement with said shoulder and proan inflation A vided with lateral perforations, a normally Qlosedvalve having engagement with'- said Seat `and provided at `one end thereof with an outer rod extension having slidable engagement with said cup', and at the opposite end thereof an inner rod extension and a tension springlocated between said cup and valve, of a tube having detachable connection with said nipple, a plunger Working in said tube, vand a tension spring for said plunger ressing the plunger against said inner ro extension and capable of overcoming the tension of the spring of said valve when pressure in the .tlre' is reduced .beyond a predetermined point, said tube havingan air escape opening and an alarm device 1n communication With said opening, and means for adjusting the tension of the spring of said plunger.

In testimony whereof I aix my signature, in presence of two witnesses.

EMIL J. F. QUIRIN. Witnesses:

A. G. VAN NONSTRAN, T. J. Tomas. 

